U-M's Mattison, on competition in spring

http://archive.freep.com/VideoNetwork/2255234586001/U-M-s-Mattison-on-competition-in-springrtmp://cp81310.edgefcs.net/ondemand/&mp4:brightcove/35547428001/35547428001_2255246335001_trim-pjEruX.mp4http://archive.freep.com/VideoNetwork/2255234586001/U-M-s-Mattison-on-competition-in-springhttp://bcdownload.gannett.edgesuite.net/detroitfreep/35547428001/35547428001_2255259330001_th-5151e2c8e4b08869086f3c56-806787298001.jpgU-M's Mattison, on competition in springMichigan defensive coordinator Greg Mattison breaks down the competition for playing time in spring football.85mfreepgreg mattisonmichigan wolverinessportsCollege footballiphoneapp_mainDFP05:04